Malicious PDF — malware analysis report

Static analysis result for SHA-256 02d9e25f6fb8cf44…

MALICIOUS

PDF

37.5 KB Created: 2020-08-31 05:04:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b900e661d0d8377db393a69795b72cd8 SHA-1: a9f5e6eb0cc8218cdda07a180019ccee5f75f3c7 SHA-256: 02d9e25f6fb8cf44a968c60d96a8a27d972915e1d5a6f3bbea40b0da69b15b0d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to Shopify-hosted PDF files, which is indicative of a link farm or SEO poisoning attempt. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/wix?keyword=assistir+a+nova+super+maquina+2+temp'. The ML classifier also strongly flagged this PDF as malicious. The presence of embedded URLs suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/wix?keyword=assistir+a+nova+super+maquina+2+temp
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0762/2817/files/voputubumimum.pdf
    • https://cdn.shopify.com/s/files/1/0434/8349/6600/files/26995346997.pdf
    • https://cdn.shopify.com/s/files/1/0437/5789/5831/files/pepevu.pdf
    • https://cdn.shopify.com/s/files/1/0436/9219/5993/files/26751138801.pdf
    • https://cdn.shopify.com/s/files/1/0463/4175/0941/files/afaceri_de_familie_amanda_quick.pdf
    • https://cdn.shopify.com/s/files/1/0433/7526/3898/files/the_yoga_of_the_bhagavad_gita_yogananda.pdf
    • https://cdn.shopify.com/s/files/1/0435/9903/6579/files/aqa_mera_sohna_naat.pdf
    • https://cdn.shopify.com/s/files/1/0432/6916/1126/files/mipulunu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3996/4834/files/fejanewivuvewofot.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/fevuzef.pdf
    • https://cdn.shopify.com/s/files/1/0436/2184/3106/files/exemplos_de_analisis_foda_de_uma_ins.pdf
    • https://cdn.shopify.com/s/files/1/0432/1561/8208/files/bhagavad_gita_english_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/non_governmental_organizations_in_kenya.pdf
    • https://cdn.shopify.com/s/files/1/0432/6273/8592/files/redibilejelelonu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054d4.bin
6b5c1c164ca7e06e7161ca2a08b9cb9653fd702af844bf05c486e5050ea5a462
pdf-font-stream PDF embedded font (sfnt) at offset 0x54D4 5240 bytes
font_01_sfnt_off0000669b.bin
4b410b0bcb078347aea576838e0d37215a22d445567c17470757a2c57ebe42ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x669B 10128 bytes